Intention tremor patient and finding
This patient has an intention tremor of the right arm with both dystaxia and dysmetria.
[Doctor] Okay, sir, take your right index finger, touch your nose and then touch my finger?
[Doctor] Now take your left finger, index finger, touch your nose and then touch my finger.
About intention tremor
An intention tremor is actually limb discoordination. During voluntary movements, the affected limb is clumsy, referred to as dystaxia and misses its intended target, referred to as dysmetria.
Localization
An intention tremor occurs due to a lesion in the cerebellar hemisphere or its pathways, with resulting disruption of the synergistic coordination between agonist and antagonist muscles. Cerebellar hemispheric lesions cause dystaxia of the ipsilateral extremities.